qiskit.opflow.gradients.NaturalGradient.nat_grad_combo_fn¶
- static NaturalGradient.nat_grad_combo_fn(x, regularization=None)[source]¶
Natural Gradient Function Implementation.
- Parameters
x (tuple) -- Iterable consisting of Gradient, Quantum Fisher Information.
regularization (Optional[str]) -- Regularization method.
- Returns
Natural Gradient.
- Raises
ValueError -- If the gradient has imaginary components that are non-negligible.
- Return type
ndarray